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Scientific glass blowing, which is practiced in some larger laboratories, is a specialized field of glassblowing. Scientific glassblowing involves precisely controlling the shape and dimension of glass, repairing expensive or difficult-to-replace glassware, and fusing together various glass parts.
A Curristor vacuum tube that had four types of nitrogen-filled, radioactive constant-current tubes with a current plateau from 25 to 500 V, all-glass wire-ended, active material is 226Ra with a half-life of 1601 years, for linear capacitor charging and draining in missile and ordinance mine timing circuits, instrumentation biasing, as current ...
Glass tubes are produced in various types of glass and in diameters ranging from a few millimeters to several centimeters. In most production processes, an "infinitely long" glass tube is drawn directly from the melt, from which approximately 1.5 m long pieces are chopped off after passing a roller track up to the drawing machine.
Broadly, modern glass container factories are three-part operations: the "batch house", the "hot end", and the "cold end". The batch house handles the raw materials; the hot end handles the manufacture proper—the forehearth, forming machines, and annealing ovens; and the cold end handles the product-inspection and packaging equipment.
The Machlett X-ray tube was produced to ‘provide electrostatic protection for the filament (cathode) so as to permit long life to be achieved at operating voltages in the range 100-300 kV’ i . The X-ray tube was designed and manufactured by E. Machlett & Son who were specialists in scientific glass instruments.
The poco grande glass has a similar fluted bowl shape, but is shallower and has a longer stem. It is used for similar drinks as the hurricane glass, but its smaller portion size (about 12 US fluid ounces or 350 ml) allows the bartender flexibility in determining the size of the drinks offered and/or the amount of alcohol in the glass.